Saboteurs kept up relentless attacks on Iraq's oil production system on Saturday, hitting pipelines in the north and south that disrupted internal supply, oil officials said.
Although the attacks did not further cut export flows, which have reverted solely to southern terminals after the northern pipeline was sabotaged two days ago, they exposed more gaps in security and further undermined the US-backed government's efforts to boost the crucial oil industry.
Flows from southern fields to the two Gulf offshore terminals were steady at two million barrels per day, although pipelines linking the Nahr Umr field to the Basra refinery and storage tanks were hit, South Oil Company officials said.
Flames could be seen rising from pipelines around 10 km (6 mi) south of the Nahr Umr oil field near the city of Basra. The field produces around 5,000 barrels per day.
In the north, saboteurs attacked a refined oil products pipeline near a region where the main crude export pipeline was blown up on Thursday, said Ahmad al-Ubaidi, a senior North Oil Company security official.
A bomb exploded underneath the products pipeline, which runs from the oil centre of Kirkuk to the Iraq's biggest oil refinery at Baiji.
The export pipeline also passes through Baiji before continuing north to the Turkish port of Ceyhan. The pipeline was still on fire on Saturday, although crews managed to build sand walls around it.
Northern exports were running at a post-war high of 600,000 bpd before saboteurs attacked the pipeline, which has been mostly shut since the US-led invasion.
Sabotage has risen over the past month, although the government worked on co-opting tribes along export routes and reinstated hundreds of former ruling Baath Party members, who were fired from the oil ministry after the war.